Ohm’s Law Calculator. Below are three calculators used for Ohm’s law to calculate the Current, Voltage and Resistance. There are basic examples below this for how to use the calculator.
Voltage | Volts | |
Resistance | Ohms | |
Current | Amps |
Resistance | Ohms | |
Current | Amps | |
Voltage | Volts |
Voltage | Volts | |
Current | Amps | |
Resistance | Ohms |
Examples of how to use the calculator
Current
In this circuit we have a 3Î© resistive lamp connected to a 6V battery. The current in the circuit is unknown. Find the current.
Using ohmâ€™s triangle, we find the formula:
Current (I) = Voltage (V) Ã· Resistance (R)
Current = 6V Ã· 3Î©
Answer is 2A
Voltage
In this circuit we have a 3Î© resistor connected to a battery with an unknown voltage. The current in the circuit is 2A. Find the voltage.
Using ohmâ€™s triangle, we find the formula:
Voltage (V) = Current (I) x Resistance (R)
Voltage = 2A x 3Î©
Answer is 6V
Resistance
In this circuit we have a resistive lamp connected to two 6V batteries, which are wired in series, providing 12V to the circuit. The current in the circuit is 0.5A. Find the resistance.
Using ohmâ€™s triangle, we find the formula:
Resistance (R) = Voltage (V) Ã· Current (I)
Resistance = 12V Ã· 0.5A
Answer is 24Î©
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Very useful in my situation, thank you.
Is there a difference between a series circuit and a parallel circuit when doing Ohm’s Law?